全俊五(黄政民 饰)是保险公司中的调查员,业务能力出色工作又认真的他深得上司的信任和赏识。某日,全俊五接到一件委托,他来到了一幢阴森的宅子面前,目睹到了悲惨而又恐怖的一幕——一具已经腐烂发臭的男孩的尸体,从天花板上掉落到了地面,而全俊五的客户,正是这名死去的男孩的父母。 经过警方的鉴定,男孩的死因是自杀,但敏感的全俊五始终觉得事有蹊跷,他忘不了在宅子里看到的一幕幕,忘不了男孩双亲眼中所流露出的贪婪的目光。全俊五决定依靠自己的力量私下调查此案,没想到却因此惹怒了沉睡中的恶魔,他一步一步的接近着事件的真相,死亡亦在一步一步的靠近他。Juno, formerly a bank employee, gets a call on his first day at work from a woman seeking advice. She asks if insurance is paid out on suicides, and only after hanging up does he see the warning on the insurance agreement. A few days Juno receives a request for a meeting with an unknown policy holder. From the living room of a decrepit house Juno opens the door to the bedroom to see a seven-year-old hanging from the ceiling. Police start an investigation, but the autopsy and all the evidence points to suicide. But Juno can't shake his suspicions that the incident was actually a murder. Believing that insurance, which should protect lives, cannot be seen to promote murder, he withholds payment. There is evidence of other serial murders, and a secret lying inside company records in storage. Where is the truth? And what is the true nature of the Black House?